Avaya Configuring Line Services Manual do Utilizador descarregar pdf (Página 120)

Configuring Line Services

4-20

Figure 4-3. KG84A Network Conﬁguration

The Bay Networks router attaches to the KG84A device via a modiﬁed V.35

synchronous cable. The encryption/decryption process is usually transparent to

the router. However, occasionally two KG84A devices can lose cryptographic

synchronization. When this occurs, the modiﬁed cable allows the router to initiate

cryptographic resynchronization. The modiﬁed cable also allows the router to

detect and monitor the local KG84A device resynchronization, whether the

resynchronization is initiated locally or by a remote KG84A device.

The router detects the loss of synchronization between KG84A devices by

monitoring the number of Frame Check Sequence (FCS) errors and valid frames

received. If the router detects FCS errors, and it does not receive a valid frame

within a time you specify, the router software requests resynchronization. The

router also requests resynchronization if it determines that the previous

resynchronization request did not complete before the time you speciﬁed.

You can also force a resynchronization of the local KG84A device by pressing its

RESYNC button. The router can detect this type of remote resynchronization also,

and can request a new resynchronization if one does not complete in the

conﬁgured time period.

Conﬁgure KG84A support on synchronous lines that connect to KG84A

cryptographic devices, using the following parameters in the Edit SYNC

Parameters window (r

efer to Figure 4-1).

Router

KG84A

Modem

KG84A

Modem

Router

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Avaya Configuring Line Services Manual do Utilizador Página 120